
What (Windows 11, macOS Sonoma, etc.) are you trying to install it on? Are you receiving a specific error code during activation?
SketchUp Pro 2020 , a "Classic License" (also known as a perpetual license) requires a specific Serial Number Authorization Code provided at the time of purchase. How to Find Your License Details
The Classic License Key and Authorization Number provide several benefits, including: What (Windows 11, macOS Sonoma, etc
Understanding SketchUp Pro 2020 Classic Licenses: Activation, Migration, and Alternatives
Trimble no longer provides technical support, security patches, or bug fixes for the 2020 version. How to Find Your License Details The Classic
: If manual entry fails, try copying the entire license email and pasting it into the "Advanced" field, or ensure no invisible characters (like "bashes" instead of "dashes") were added during copying. SketchUp Community Review: Classic 2020 vs. Current Subscription
If you cannot find the email but have your serial number, use the SketchUp License Manager to retrieve your authorization code. Serial Number Format: Current Subscription If you cannot find the email
Click to complete activation over an active internet connection. Limitations of Staying on SketchUp 2020
If your serial number starts with a different letter, it belongs to a different version:

